<?php
// 1. [Required] Point to the composer or dompdf autoloader
require_once "vendor/autoload.php";

// 2. [Optional] Set the path to your font directory
//    By default dompdf loads fonts to dompdf/lib/fonts
//    If you have modified your font directory set this
//    variable appropriately.
//$fontDir = "lib/fonts";


// *** DO NOT MODIFY BELOW THIS POINT ***

use Dompdf\Dompdf;
use Dompdf\CanvasFactory;
use Dompdf\Exception;
use Dompdf\FontMetrics;
use Dompdf\Options;

use FontLib\Font;

/**
 * Display command line usage
 */
function usage() {
    echo <<<EOD
Usage: {$_SERVER["argv"][0]} font_family [n_file [b_file] [i_file] [bi_file]]
font_family:      the name of the font, e.g. Verdana, 'Times New Roman',
                  monospace, sans-serif. If it equals to "system_fonts", 
                  all the system fonts will be installed.
n_file:           the .ttf or .otf file for the normal, non-bold, non-italic
                  face of the font.
{b|i|bi}_file:    the files for each of the respective (bold, italic,
                  bold-italic) faces.
If the optional b|i|bi files are not specified, load_font.php will search
the directory containing normal font file (n_file) for additional files that
it thinks might be the correct ones (e.g. that end in _Bold or b or B).  If
it finds the files they will also be processed.  All files will be
automatically copied to the DOMPDF font directory, and afm files will be
generated using php-font-lib (https://github.com/PhenX/php-font-lib).
Examples:
./load_font.php silkscreen /usr/share/fonts/truetype/slkscr.ttf
./load_font.php 'Times New Roman' /mnt/c_drive/WINDOWS/Fonts/times.ttf
EOD;
    exit;
}

if ( $_SERVER["argc"] < 3 && @$_SERVER["argv"][1] != "system_fonts" ) {
    usage();
}

$dompdf = new Dompdf();
if (isset($fontDir) && realpath($fontDir) !== false) {
    $dompdf->getOptions()->set('fontDir', $fontDir);
}

/**
 * Installs a new font family
 * This function maps a font-family name to a font.  It tries to locate the
 * bold, italic, and bold italic versions of the font as well.  Once the
 * files are located, ttf versions of the font are copied to the fonts
 * directory.  Changes to the font lookup table are saved to the cache.
 *
 * @param Dompdf $dompdf      dompdf main object
 * @param string $fontname    the font-family name
 * @param string $normal      the filename of the normal face font subtype
 * @param string $bold        the filename of the bold face font subtype
 * @param string $italic      the filename of the italic face font subtype
 * @param string $bold_italic the filename of the bold italic face font subtype
 *
 * @throws Exception
 */
function install_font_family($dompdf, $fontname, $normal, $bold = null, $italic = null, $bold_italic = null) {
    $fontMetrics = $dompdf->getFontMetrics();

    // Check if the base filename is readable
    if ( !is_readable($normal) )
        throw new Exception("Unable to read '$normal'.");

    $dir = dirname($normal);
    $basename = basename($normal);
    $last_dot = strrpos($basename, '.');
    if ($last_dot !== false) {
        $file = substr($basename, 0, $last_dot);
        $ext = strtolower(substr($basename, $last_dot));
    } else {
        $file = $basename;
        $ext = '';
    }

    if ( !in_array($ext, array(".ttf", ".otf")) ) {
        throw new Exception("Unable to process fonts of type '$ext'.");
    }

    // Try $file_Bold.$ext etc.
    $path = "$dir/$file";

    $patterns = array(
        "bold"        => array("_Bold", "b", "B", "bd", "BD"),
        "italic"      => array("_Italic", "i", "I"),
        "bold_italic" => array("_Bold_Italic", "bi", "BI", "ib", "IB"),
    );

    foreach ($patterns as $type => $_patterns) {
        if ( !isset($$type) || !is_readable($$type) ) {
            foreach($_patterns as $_pattern) {
                if ( is_readable("$path$_pattern$ext") ) {
                    $$type = "$path$_pattern$ext";
                    break;
                }
            }

            if ( is_null($$type) )
                echo ("Unable to find $type face file.\n");
        }
    }

    $fonts = compact("normal", "bold", "italic", "bold_italic");
    $entry = array();

    // Copy the files to the font directory.
    foreach ($fonts as $var => $src) {
        if ( is_null($src) ) {
            $entry[$var] = $dompdf->getOptions()->get('fontDir') . '/' . mb_substr(basename($normal), 0, -4);
            continue;
        }

        // Verify that the fonts exist and are readable
        if ( !is_readable($src) )
            throw new Exception("Requested font '$src' is not readable");

        $dest = $dompdf->getOptions()->get('fontDir') . '/' . basename($src);

        if ( !is_writeable(dirname($dest)) )
            throw new Exception("Unable to write to destination '$dest'.");

        echo "Copying $src to $dest...\n";

        if ( !copy($src, $dest) )
            throw new Exception("Unable to copy '$src' to '$dest'");

        $entry_name = mb_substr($dest, 0, -4);

        echo "Generating Adobe Font Metrics for $entry_name...\n";

        $font_obj = Font::load($dest);
        $font_obj->saveAdobeFontMetrics("$entry_name.ufm");
        $font_obj->close();

        $entry[$var] = $entry_name;
    }

    // Store the fonts in the lookup table
    $fontMetrics->setFontFamily($fontname, $entry);

    // Save the changes
    $fontMetrics->saveFontFamilies();
}

// If installing system fonts (may take a long time)
if ( $_SERVER["argv"][1] === "system_fonts" ) {
    $fontMetrics = $dompdf->getFontMetrics();
    $files = glob("/usr/share/fonts/truetype/*.ttf") +
        glob("/usr/share/fonts/truetype/*/*.ttf") +
        glob("/usr/share/fonts/truetype/*/*/*.ttf") +
        glob("C:\\Windows\\fonts\\*.ttf") +
        glob("C:\\WinNT\\fonts\\*.ttf") +
        glob("/mnt/c_drive/WINDOWS/Fonts/");
    $fonts = array();
    foreach ($files as $file) {
        $font = Font::load($file);
        $records = $font->getData("name", "records");
        $type = $fontMetrics->getType($records[2]);
        $fonts[mb_strtolower($records[1])][$type] = $file;
        $font->close();
    }

    foreach ( $fonts as $family => $files ) {
        echo " >> Installing '$family'... \n";

        if ( !isset($files["normal"]) ) {
            echo "No 'normal' style font file\n";
        }
        else {
            install_font_family($dompdf, $family, @$files["normal"], @$files["bold"], @$files["italic"], @$files["bold_italic"]);
            echo "Done !\n";
        }

        echo "\n";
    }
}
else {
    call_user_func_array("install_font_family", array_merge( array($dompdf), array_slice($_SERVER["argv"], 1) ));
}
